Anyone have a Powertrax installed?

[75sierraclassic]

I've been looking for a posi unit to put into my truck. I've been really interested in the Powertrax line. They make the Lock Right locker and the Powertrax limited slip. Does anyone have either of these in their trucks. I know the limited slip would be the best route, but the Lock Right is much cheaper. Since I will only be driving my truck on the street, I wanted to see how harsh the locker is compared to the limited slip.
Thanks